Cooling is still being ate up. Took to a different dealer for second opinion. No physical leaks dealer put in dye to see if they could find the leak told me to drive it around for a few hundred miles.

5th time in the garage for the same issue. Car is eating coolant. no visual signs of leaking. Dealer said they found a leak and the coil pack is showing up as bad. I contacted GM Corporate, They have a case open. Car is hesitating VERY bad. Engine light is flashing and Traction light is on.

Took car back again now 4th time, coolant still disappearing no visual signs of where., Dealer changed Thermostat. Still did not fix problem

This should be a recall no one could find the leak. I brought it to the mechanic and they said nothing was wrong bc they couldn't find the leak ... here it was leaking into my engine and blew a head gasket I can see a lot of us are having these issues